2021-06-03 boj 14226

baekjoon/14226.go

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+)
+
+var (
+	w  = bufio.NewWriter(os.Stdout)
+	sc = bufio.NewScanner(os.Stdin)
+)
+
+var (
+	D [1004][1004]int
+)
+
+type pair struct {
+	x, c int
+}
+
+func main() {
+	defer w.Flush()
+	S := scanInt()
+	for i := range D {
+		for j := range D[i] {
+			D[i][j] = -1
+		}
+	}
+	D[1][0] = 0
+	q := make([]pair, 0)
+	q = append(q, pair{1, 0})
+	for len(q) != 0 {
+		nx, nc := q[0].x, q[0].c
+		q = q[1:]
+		// clipboard copy
+		if D[nx][nx] == -1 {
+			D[nx][nx] = D[nx][nc] + 1
+			q = append(q, pair{nx, nx})
+		}
+		// clipboard paste
+		if nx+nc < 1004 && D[nx+nc][nc] == -1 {
+			D[nx+nc][nc] = D[nx][nc] + 1
+			if nx+nc == S {
+				fmt.Fprintln(w, D[nx+nc][nc])
+				break
+			}
+			q = append(q, pair{nx + nc, nc})
+		}
+		// delete
+		if 0 <= nx-1 && D[nx-1][nc] == -1 {
+			D[nx-1][nc] = D[nx][nc] + 1
+			if nx-1 == S {
+				fmt.Fprintln(w, D[nx-1][nc])
+				break
+			}
+			q = append(q, pair{nx - 1, nc})
+		}
+	}
+}
+
+func scanInt() int {
+	sc.Scan()
+	n, _ := strconv.Atoi(sc.Text())
+	return n
+}